Calculator Functions :
Printing detached from typing/calculation - options: no print, printing while/after calculating (re-print), calendar/clock with back-up battery, for printing time/date stamp,
printing reference number, recall, check & correct of last 150 calculation steps incl. re-print of revision, advanced % calculation, showing absolute value of % before adding, mark-up / mark-down: calculation of sales price, given certain profit% or loss% demand, Cost / Sell / Margin keys for easiest profit calculation of any of these values (margin: % and absolute), tax calculation of price plus tax, price less tax, display of tax amount, rate programmable, delta % calculation, constant calculation, item counter and average calculation, summarizing 4-key memory, held after auto-off, grand total, total, sub-total sum memories, rounding (5/4) to 0/2/3 decimals, add-2-mode, +/- algebraic sign change, input buffer memory (key rollover), adding machine typical input logic
Buttons & Keys :
00, backspace, CLEAR (last value), ALL CLEAR